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Journal of Shanghai University（Natural Science Edition） ›› 2010, Vol. 16 ›› Issue (5): 547-552.

• Environmental and Chemical Engineering • Previous Articles     Next Articles

Effects of Blend Surfactant on Performance of CTAB and Three Different C12 Anionic Surfactants Complex Oil Displacing System

  

  1. 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; 2. Shengli Oilfield Company of Geological Sciences, SINOPEC, Dongying 257000, Shandong， China
  • Received:2010-07-06 Online:2010-10-30 Published:2010-10-30

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Abstract:

Properties of three kinds of surfactant composition systems with different hydrophilic group of anionic surfactant (sodium alkyl benzene sulfonate (ABS), sodium dodecyl sulfate (SDS), sodium dichloroisocyanurate (SDC)) and the same cationic surfactant cetyltriethyl ammonium bromide (CTAB) were studied. Compatibility, foam property, contact angle, surface tension and interfacial tension of the systems were measured. The results showed when the mol ratio of anionic and cationic surfactant was close to 1∶1, the systems lost part of foam capacity while surface tension and interfacial tension reached the peak and contact angle was the lowest. The SDC-CTAB system reached ultra-low interfacial tension (IFT) with crude oil when the mass fraction of CTAB was in the range of 10% to 30% in the blend system.

Key words: anionic and cationic surfactant; blend system; molar ratio; foam properties; interfacial tension (IFT)

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